Imaging lens module with plastic barrel and electronic device including same module

ABSTRACT

An imaging lens module has an optical axis, an object side and an image side. The imaging lens module includes a plastic barrel, an optical lens assembly, an image-side assembled element and a light blocking element assembly. The plastic barrel includes a first contacting surface, which is close to an image-side end of the plastic barrel. The image-side assembled element is disposed close to the image-side end of the plastic barrel. The image-side assembled element is in a tube shape and extends from the object side to the image side. The image-side assembled element includes a second contacting surface and an inner protruding portion, and the second contacting surface is disposed close to an object-side end of the image-side assembled element and correspondingly to the first contacting surface. The plastic barrel and the image-side assembled element contact each other via the first contacting surface and the second contacting surface.

RELATED APPLICATIONS

This application claims priority to Taiwan Application Serial Number108114950, filed Apr. 29, 2019, which is herein incorporated byreference.

BACKGROUND Technical Field

The present disclosure relates to an imaging lens module and anelectronic device. More particularly, the present disclosure relates toa compact imaging lens module which includes a plastic barrel and isapplicable to electronic devices.

Description of Related Art

With the advanced semiconductor manufacturing technologies, theperformances of image sensors are enhanced, and the pixel size isminified. Therefore, imaging lens modules with high image quality becomeindispensable.

Moreover, with the rapid scientific and technological progress, theapplication scope of electronic devices equipped with imaging lensmodules becomes wider, and the requirements for imaging lens modules aremore diverse. However, it is hard for balancing the requirements, suchas image quality, sensitivity, aperture size, volume and field of view,in conventional imaging lens modules. Therefore, an imaging lens moduleis provided by the present disclosure to satisfy the desiredrequirement.

SUMMARY

According to one aspect of the present disclosure, an imaging lensmodule has an optical axis, an object side and an image side. Theimaging lens module includes a plastic barrel, an optical lens assembly,an image-side assembled element and a light blocking element assembly.The plastic barrel surrounds the optical axis to form an accommodatingspace and includes a first contacting surface, which is close to animage-side end of the plastic barrel. The optical lens assembly isdisposed in the accommodating space of the plastic barrel and includes aplurality of optical lens elements. The image-side assembled element isdisposed close to the image-side end of the plastic barrel. Theimage-side assembled element is in a tube shape and extends from theobject side to the image side, and the image-side assembled elementsurrounds the optical axis and is disposed coaxially with the plasticbarrel. The image-side assembled element includes a second contactingsurface and an inner protruding portion, the second contacting surfaceis disposed close to an object-side end of the image-side assembledelement and correspondingly to the first contacting surface, the innerprotruding portion extends toward the optical axis, and a minimumopening of the image-side assembled element is located at the innerprotruding portion. The light blocking element assembly is disposed inthe image-side assembled element and includes a plurality of lightblocking elements. One of the light blocking elements is abutted with anannular wall of the inner protruding portion. The plastic barrel and theimage-side assembled element contact each other via the first contactingsurface and the second contacting surface. When a length along anoptical axis direction of the plastic barrel is L1, and a length alongthe optical axis direction of the image-side assembled element is L2,the following condition is satisfied: 1.5<L1/L2<5.0.

According to another aspect of the present disclosure, an electronicdevice includes the imaging lens module according to the foregoingaspect and an image sensor, which is disposed on an image surface of theimaging lens module.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1A is a schematic view of an imaging lens module according to the1st embodiment of the present disclosure.

FIG. 1B is an exploded view of the imaging lens module according to FIG.1A.

FIG. 1C is a three-dimensional view of the imaging lens module accordingto the 1st embodiment.

FIG. 1D is an exploded view of the imaging lens module according to FIG.1C and an image sensor.

FIG. 1E is a three-dimensional view of a plastic barrel of the 1stembodiment.

FIG. 1F is a side view from an object side of the plastic barrel of the1st embodiment.

FIG. 1G is a side view from an image side of the plastic barrel of the1st embodiment.

FIG. 1H is a three-dimensional view of an image-side assembled elementof the 1st embodiment.

FIG. 1I is a side view from the object side of the image-side assembledelement of the 1st embodiment.

FIG. 1J is a side view from the image side of the image-side assembledelement of the 1st embodiment.

FIG. 1K is a three-dimensional view of a light blocking sheet of the 1stembodiment.

FIG. 1L is a side view of the light blocking sheet of the 1stembodiment.

FIG. 2A is a schematic view of an imaging lens module according to the2nd embodiment of the present disclosure.

FIG. 2B is an exploded view of the imaging lens module according to FIG.2A.

FIG. 2C is a three-dimensional view of a plastic barrel of the 2ndembodiment.

FIG. 2D is a three-dimensional view of an image-side assembled elementof the 2nd embodiment.

FIG. 2E is a three-dimensional view of a light blocking sheet of the 2ndembodiment.

FIG. 3A is a schematic view of an imaging lens module according to the3rd embodiment of the present disclosure.

FIG. 3B is an exploded view of the imaging lens module according to FIG.3A.

FIG. 3C is a three-dimensional view of a plurality of wedge structuresof the 3rd embodiment.

FIG. 4A is a schematic view of an imaging lens module according to the4th embodiment of the present disclosure.

FIG. 4B is an exploded view of the imaging lens module according to FIG.4A.

FIG. 4C is a three-dimensional view of a plastic barrel of the 4thembodiment.

FIG. 4D is a three-dimensional view of a first retainer of the 4thembodiment.

FIG. 5A shows a schematic view of an electronic device according to the5th embodiment of the present disclosure.

FIG. 5B shows another schematic view of the electronic device accordingto the 5th embodiment.

FIG. 5C shows a block diagram of the electronic device according to the5th embodiment.

FIG. 6A shows a schematic view of an electronic device according to the6th embodiment of the present disclosure.

FIG. 6B shows another schematic view of the electronic device accordingto the 6th embodiment.

FIG. 7 shows an electronic device according to the 7th embodiment of thepresent disclosure.

DETAILED DESCRIPTION 1st Embodiment

FIG. 1A is a schematic view of an imaging lens module 100 according tothe 1st embodiment of the present disclosure. FIG. 1B is an explodedview of the imaging lens module 100 according to FIG. 1A. FIG. 1C is athree-dimensional view of the imaging lens module 100 according to the1st embodiment. FIG. 1D is an exploded view of the imaging lens module100 according to FIG. 1C and an image sensor 73. In FIG. 1A to FIG. 1D,an imaging lens module 100 has an optical axis z, an object side za andan image side zb. The object side za is a side toward an imaged-object(not shown in drawings) of the imaging lens module 100, and the imageside zb is a side toward an image surface (not shown in drawings) of theimaging lens module 100. The imaging lens module 100 includes a plasticbarrel 110, an optical lens assembly 140, an image-side assembledelement 160 and a light blocking element assembly 180. In addition, whenthe imaging lens module 100 is assembled in an electronic device, theimage sensor 73 of the electronic device is disposed on the imagesurface of the imaging lens module 100.

FIG. 1E is a three-dimensional view of the plastic barrel 110 of the 1stembodiment. FIG. 1F is a side view from the object side za of theplastic barrel 110 of the 1st embodiment. FIG. 1G is a side view fromthe image side zb of the plastic barrel 110 of the 1st embodiment. InFIG. 1A, FIG. 1E to FIG. 1G, the plastic barrel 110 surrounds theoptical axis z to form an accommodating space 117 and includes a firstcontacting surface 115, which is close to an image-side end 110 b of theplastic barrel 110. The image-side end 110 b is an end, which is towardthe image side zb, of the plastic barrel 110. Specifically, the plasticbarrel 110 is in a tube shape and extends from the object side za to theimage side zb (i.e., extends from the image side zb to the object sideza). The plastic barrel 110 further includes an inner protruding portion112, which extends toward the optical axis z, and a minimum opening 119of the plastic barrel 110 is located at the inner protruding portion112.

The optical lens assembly 140 is disposed in the accommodating space 117of the plastic barrel 110 and includes a plurality of (i.e., at leasttwo) optical lens elements. Specifically, the optical lens assembly 140includes optical lens elements 141, 142, 143, 144 and 145, in order fromthe object side za to the image side zb.

FIG. 1H is a three-dimensional view of the image-side assembled element160 of the 1st embodiment. FIG. 1I is a side view from the object sideza of the image-side assembled element 160 of the 1st embodiment. FIG.1J is a side view from the image side zb of the image-side assembledelement 160 of the 1st embodiment. In FIG. 1A, FIG. 1B and FIG. 1H toFIG. 1J, the image-side assembled element 160 is disposed close andconnected to the image-side end 110 b of the plastic barrel 110. Theimage-side assembled element 160 is in a tube shape and extends from theobject side za to the image side zb (i.e., extends from the image sidezb to the object side za), and the image-side assembled element 160surrounds the optical axis z and is disposed coaxially with the plasticbarrel 110. The image-side assembled element 160 includes a secondcontacting surface 165 and an inner protruding portion 162. The secondcontacting surface 165 is disposed close to an object-side end 160 a ofthe image-side assembled element 160 and correspondingly to the firstcontacting surface 115. The object-side end 160 a is an end, which istoward the object side za, of the image-side assembled element 160. Theinner protruding portion 162 extends toward the optical axis z, and aminimum opening 179 of the image-side assembled element 160 is locatedat the inner protruding portion 162.

In FIG. 1A to FIG. 1D, the light blocking element assembly 180 isdisposed in the image-side assembled element 160 and includes aplurality of (i.e., at least two) light blocking elements. Specifically,the light blocking element assembly 180 includes light blocking elements181, 171 and 182, in order from the object side za to the image side zb.The light blocking element 181 among the light blocking elements 181,171 and 182 is abutted with an annular wall 163 b of the innerprotruding portion 162. In the 1st embodiment, each of the lightblocking elements 181 and 182 is a light blocking sheet, the lightblocking element 171 is a spacer, and the light blocking element 171 isdisposed between the light blocking elements 181 and 182. The innerprotruding portion 162 of the image-side assembled element 160 includesannular walls 163 a and 163 b. A normal direction of the annular wall163 a and a normal direction of the annular wall 163 b are both parallelto the optical axis z.

In FIG. 1A, the plastic barrel 110 and the image-side assembled element160 both in the tube shapes contact each other via the first contactingsurface 115 and the second contacting surface 165 to be disposedcoaxially with respect to the optical axis z. Specifically, the firstcontacting surface 115 is located at an inner annular surface of theplastic barrel 110, which is closer to the optical axis z than an outerannular surface thereof. The second contacting surface 165 is located atan outer annular surface of the image-side assembled element 160, whichis farther away from the optical axis z than an inner annular surfacethereof.

Furthermore, the plastic barrel 110 and the optical lens assembly 140are assembled to be an optical imaging assembly. The optical lensassembly 140 may further include light blocking elements, such as alight blocking sheet, a spacer, etc. As shown in FIG. 1A and FIG. 1B,there are a light blocking sheet and a spacer in order from the objectside za to the image side zb between the optical lens elements 143 and144. The optical imaging assembly has light refractive power for imagingand controlling the image quality. The image-side assembled element 160and the light blocking element assembly 180 are assembled to be animage-side light blocking assembly, which does not include a lenselement. The image-side light blocking assembly is configured to blocklight so as to block the stray light.

When a length along a direction of the optical axis z (i.e., an opticalaxis z direction) of the plastic barrel 110 is L1, and a length alongthe direction of the optical axis z of the image-side assembled element160 is L2, the following condition is satisfied: 1.5<L1/L2<5.0.Therefore, there are two assemblies (i.e., the optical imaging assemblyand the image-side light blocking assembly aforementioned in the lastparagraph) configured in the imaging lens module according to thepresent disclosure. One assembly thereof is configured to opticallyimage, and the other assembly thereof is configured to block the straylight. Thus, it is favorable for selecting and arranging the opticalimaging assembly and the image-side light blocking assembly with thecorresponding types based on various specifications and requirements, soas to raise the production efficiency and reduce the production cost ofthe imaging lens module. Moreover, the imaging lens module 100 assembledwith two assemblies is advantageous in tolerating more concentricitytolerances, maintaining the manufacturing yield rate, and reducing thestray light in an image-side end of the imaging lens module 100 so as toenhance the image quality.

Furthermore, the image-side assembled element 160 and the light blockingelement assembly 180 with the light blocking design are added to theplastic barrel 110 on the image side zb is applicable in the imaginglens module 100 being as a telephoto optical system. The image-sideassembled element 160 is assembled on the plastic barrel 110 on theimage side zb, and thereby the plastic barrel 110 and the image-sideassembled element 160 can be assembled with the optical lens assembly140 and the light blocking element assembly 180, respectively, to addthe light blocking manners. The light blocking manners added by theimage-side assembled element 160 and the light blocking element assembly180 are favorable for suppressing the flare occurrences come out of theimaging lens module 100, in particular, suppressing the stray lightdefects neglected in the engineering design phase of the lens drivingapparatus (e.g., autofocus assembly) itself. In addition, the design ofthe image-side assembled element 160 and the light blocking elementassembly 180 would not negatively affect the image quality andspecification of the optical lens assembly 140 after assembling with thelight blocking manners.

In FIG. 1A and FIG. 1H, a glue groove 121 may be formed between theplastic barrel 110 and the image-side assembled element 160. A gluematerial 122 is disposed in the glue groove 121. The glue material 122is an adhesive of unlimited materials. Therefore, the imaging lensmodule 100 is advantageous in being processed by a side-dispensingtechnique so as to increase the structural stability thereof. In the 1stembodiment, the glue groove 121 is formed between a recessed section ofthe inner annular surface of the plastic barrel 110 and the outerannular surface of the image-side assembled element 160. The image-sideassembled element 160 includes at least two annular side openings 174,so that the glue groove 121 between the plastic barrel 110 and theimage-side assembled element 160 is connected to the outside of theimaging lens module 100.

In FIG. 1A, FIG. 1D and FIG. 1E, at least one of the first contactingsurface 115 and the second contacting surface 165 (specifically, thefirst contacting surface 115) may include a plurality of stripestructures 116. Each of the stripe structures 116 is in a stripe shapebeing slightly protruded or slightly recessed, and extends to the gluegroove 121 between the plastic barrel 110 and the image-side assembledelement 160. The stripe structures 116 are regularly arranged along acircumferential direction of the optical axis z. Therefore, it isfavorable for providing more assembling and contacting force between theplastic barrel 110 and the image-side assembled element 160, and therebyachieving a stabler structure of the imaging lens module 100 whilecooperating with the glue. In the 1st embodiment, each of the firstcontacting surface 115, the second contacting surface 165 and the gluegroove 121 is in an annular shape (i.e., a ring shape) around theoptical axis z. In another embodiment according to the presentdisclosure (not shown in drawings), each of the first contacting surfaceand the second contacting surface includes a plurality of stripestructures.

When a number of the stripe structures 116 of the first contactingsurface 115 is N, the following condition may be satisfied: 60≤N≤360.Therefore, the denser arrangement of the stripe structures 116 isbeneficial for the glue material 122 to evenly flow.

In FIG. 1A, when a length along the direction of the optical axis z ofeach of the first contacting surface 115 and the second contactingsurface 165 is d, and a smallest distance from the first contactingsurface 115 and the second contacting surface 165 to the optical axis zis D, the following condition may be satisfied: 0.03<d/D<0.35.Therefore, the plastic barrel 110 and the image-side assembled element160 are firmly and stably assembled via the first contacting surface 115and the second contacting surface 165.

In FIG. 1B, FIG. 1F and FIG. 1I, when a diameter of a minimum opening119 of the plastic barrel 110 is φ1, and a diameter of the minimumopening 179 of the image-side assembled element 160 is φ2, the followingcondition may be satisfied: 0.7<φ2/φ1<1.2. Therefore, it is favorablefor preventing the excess concentric tolerance between the plasticbarrel 110 and the image-side assembled element 160. In addition, theminimum opening 179 of the image-side assembled element 160 is in anon-circular shape, and the parameter φ2 is a minimum diameter passingthrough the optical axis z of the minimum opening 179, as shown in FIG.1I.

In FIG. 1B, FIG. 1H and FIG. 1J, the minimum opening 179 is formed by aminimum inner annular surface 176 of the image-side assembled element160. The minimum inner annular surface 176 is a position of the innerannular surface of the image-side assembled element 160 locatedcorresponding to the minimum opening 179. The minimum opening 179 is ina non-circular shape. The minimum inner annular surface 176 includes aplurality of arc sections 177 and a plurality of line sections 178. Thearc sections 177 have the same radius value (i.e., the same curvatureradius value) and the same circle center being the optical axis z. Thearc sections 177 and the line sections 178 are alternatively arrangedalong the circumferential direction of the optical axis z. Two ends ofeach of the line sections 178 are respectively connected to two of thearc sections 177, i.e., two ends of each of the arc sections 177 arerespectively connected to two of the line sections 178. Therefore, it isfavorable for alignment identifying during assembling the imaging lensmodule 100. In the 1st embodiment, a number of the arc sections 177 isfour, and a number of the line sections 178 is four.

In FIG. 1H and FIG. 1I, the image-side assembled element 160 may be madeof a black plastic material by an injection molding method, and theouter annular surface of the image-side assembled element 160 includesat least two gate traces 169. Therefore, it is favorable for reducingthe occurrence probability of insufficiently filling and the unevensurface during an injection molding process of the image-side assembledelement 160. In the 1st embodiment, a number of the gate traces 169 istwo, and the two gate traces 169 are symmetrical with respect to theoptical axis z.

In FIG. 1A, FIG. 1B and FIG. 1D, the imaging lens module 100 may furtherinclude a light blocking sheet 150 disposed between the plastic barrel110 and the annular wall 163 a of the inner protruding portion 162 ofthe image-side assembled element 160. An object-side surface 150 a ofthe light blocking sheet 150 is abutted with the plastic barrel 110, andan image-side surface 150 b of the light blocking sheet 150 is abuttedwith the annular wall 163 a. Therefore, the stray light from and aroundcontacting positions (among the first contacting surface 115, the secondcontacting surface 165, the glue groove 121 and the glue material 122)between the plastic barrel 110 and the image-side assembled element 160can be effectively blocked.

FIG. 1K is a three-dimensional view of the light blocking sheet 150 ofthe 1st embodiment. FIG. 1L is a side view of the light blocking sheet150 of the 1st embodiment. In FIG. 1D, FIG. 1K and FIG. 1L, among thelight blocking elements 181, 171 and 182 of the light blocking elementassembly 180, each of the light blocking elements 181 and 182 is a lightblocking sheet. Among the light blocking sheet 150 and the lightblocking elements 181, 182, which are the light blocking sheets, aninner opening 159 is formed by an inner annular surface 156 of the lightblocking sheet 150. The inner opening 159 is in a non-circular shape.The inner annular surface 156 includes a plurality of arc sections 157and a plurality of line sections 158. The arc sections 157 have the sameradius value (i.e., the same curvature radius value) and the same circlecenter being the optical axis z. The arc sections 157 and the linesections 158 are alternatively arranged along the circumferentialdirection of the optical axis z, and each of the line sections 158 isconnected between two of the arc sections 157. Therefore, at least oneof the light blocking sheet 150 and the light blocking elements 181,182, which are the light blocking sheets, having the aforementionedfeatures is advantageous in enhancing the efficiency of blockingnon-imaging light.

Specifically, the light blocking sheet 150 and the light blockingelements 181, 182, which are the light blocking sheets, all have thefeatures aforementioned in the last paragraph. The inner opening 159 isformed by the inner annular surface 156 of the light blocking sheet 150.The inner opening 159 is in the non-circular shape. The inner annularsurface 156 includes four arc sections 157 and four line sections 158.The arc sections 157 have the same radius value and the same circlecenter. The arc sections 157 and the line sections 158 are alternativelyarranged along the circumferential direction of the optical axis z. Twoends of each of the line sections 158 are respectively connected to twoof the arc sections 157, i.e., two ends of each of the arc sections 157are respectively connected to two of the line sections 158. An inneropening 1819 is formed by an inner annular surface 1816 of the lightblocking element 181. The inner opening 1819 is in a non-circular shape.The inner annular surface 1816 includes four arc sections 1817 and fourline sections 1818. The arc sections 1817 have the same radius value andthe same circle center. The arc sections 1817 and the line sections 1818are alternatively arranged along the circumferential direction of theoptical axis z. Two ends of each of the line sections 1818 arerespectively connected to two of the arc sections 1817, i.e., two endsof each of the arc sections 1817 are respectively connected to two ofthe line sections 1818. An inner opening 1829 is formed by an innerannular surface 1826 of the light blocking element 182. The inneropening 1829 is in a non-circular shape. The inner annular surface 1826includes four arc sections 1827 and four line sections 1828. The arcsections 1827 have the same radius value and the same circle center. Thearc sections 1827 and the line sections 1828 are alternatively arrangedalong the circumferential direction of the optical axis z. Two ends ofeach of the line sections 1828 are respectively connected to two of thearc sections 1827, i.e., two ends of each of the arc sections 1827 arerespectively connected to two of the line sections 1828.

In FIG. 1D, FIG. 1I and FIG. 1K, the inner annular surface of theplastic barrel 110 may further include a directional protrusion 123,which protrudes toward the optical axis z and extends along thedirection of the optical axis z, i.e., the directional protrusion 123has a specific thickness along the direction of the optical axis z. Anouter annular surface of the light blocking sheet 150 includes adirectional notch 153 recessed toward the optical axis z. A position,which is located correspondingly to the inner protruding portion 162, ofthe outer annular surface of the image-side assembled element 160includes a directional groove 173, which is recessed toward the opticalaxis z and extends along the direction of the optical axis z, i.e., thedirectional groove 173 has a specific recessed distance along thedirection of the optical axis z. The directional protrusion 123 isdisposed correspondingly to the directional notch 153 and thedirectional groove 173. Therefore, it is favorable for reducing thewarpage occurrence probability of the light blocking sheet 150,providing automatic visual identification and positioning capabilityduring assembling, and raising the assembling efficiency of the imaginglens module 100.

In FIG. 1A and FIG. 1D, the imaging lens module 100 may further includea first retainer 130 disposed in the accommodating space 117 of theplastic barrel 110 and for fixedly disposing the optical lens assembly140. A glue groove 131 is formed between the plastic barrel 110 and thefirst retainer 130, and a glue material 132 is disposed in the gluegroove 131. Therefore, it is favorable for enhancing the structuralstability of the imaging lens module 100 so as to reduce the occurrenceprobability of space distance changing between the optical elementsresulted from the collisions. Specifically, the first retainer 130 isdisposed on the object side za with respect to the optical lens assembly140 and for fixedly disposing the optical lens assembly 140. The gluegroove 131 is formed between a recessed section of the inner annularsurface of the plastic barrel 110 and an outer surface of the firstretainer 130.

A contact surface 113 of the plastic barrel 110 and a contact surface133 of the first retainer 130 may contact each other. At least one ofthe contact surface 113 of the plastic barrel 110 and the contactsurface 133 of the first retainer 130 (specifically, the contact surface133 of the first retainer 130) includes a plurality of stripe structures134. Each of the stripe structures 134 is in a stripe shape (e.g., asthe stripe structures 116 shown in FIG. 1E) and extends to the gluegroove 131, which is formed between the plastic barrel 110 and the firstretainer 130. The stripe structures 134 are regularly arranged along thecircumferential direction of the optical axis z. Therefore, it isfavorable for increasing the assembling and contacting force between theplastic barrel 110 and the first retainer 130, so as to raise thedispensing efficiency and conveniently manufacture the stripe structures134 by the injection molding method. In the 1st embodiment, the contactsurface 113 is located on the inner annular surface of the plasticbarrel 110, and the contact surface 133 is located on the outer annularsurface of the first retainer 130. Each of the contact surfaces 113, 133and the glue groove 131 is in two arc shapes corresponding to the samepositions on the circumferential direction of the optical axis z. Inanother embodiment (not shown in drawings) according to the presentdisclosure, a contact surface of the plastic barrel and a contactsurface of the first retainer contact each other and both include aplurality of stripe structures.

The imaging lens module 100 may further include a second retainer 190disposed in the image-side assembled element 160 and for fixedlydisposing the light blocking element assembly 180. A glue groove 191 isformed between the image-side assembled element 160 and the secondretainer 190, and a glue material 192 is disposed in the glue groove191. Therefore, it is favorable for enhancing the structural stabilityof the imaging lens module 100 so as to reduce the tilt occurrenceprobability of the optical elements resulted from the collisions.Specifically, the second retainer 190 is disposed on the image side zbwith respect to the light blocking element assembly 180 and for fixedlydisposing the light blocking element assembly 180. The glue groove 191is formed between a recessed section of the inner annular surface of theimage-side assembled element 160 and an outer annular surface of thesecond retainer 190.

Furthermore, a contact surface 167 of the image-side assembled element160 and a contact surface 197 of the second retainer 190 may contacteach other. The contact surfaces 167 and 197 extend to the glue groove191, which is formed between the image-side assembled element 160 andthe second retainer 190. Specifically, the contact surface 167 islocated on the inner annular surface of the image-side assembled element160, and the contact surface 197 is located on the outer annular surfaceof the second retainer 190. Each of the contact surfaces 167, 197 andthe glue groove 191 is in two arc shapes corresponding to the samepositions on the circumferential direction of the optical axis z.

In FIG. 1B, among the optical lens elements 141, 142, 143, 144 and 145of the optical lens assembly 140, a distance along the direction of theoptical axis z between an object-side surface 141 a of the optical lenselement 141, which is closest to the object side za thereamong, and animage-side surface 145 b of the optical lens element 145, which isclosest to the image side zb thereamong, is Td. Among the light blockingelements 181, 171 and 182 of the light blocking element assembly 180, adistance along the direction of the optical axis z between anobject-side surface 181 a of the light blocking element 181, which isclosest to the object side za thereamong, and an image-side surface 182b of the light blocking element 182, which is closest to the image sidezb thereamong, is W. The following condition may be satisfied:0.10<W/Td<0.35. Therefore, the longitudinal depth range in theaforementioned condition is advantageous in enhancing the light blockingefficiency of an image-side end of the imaging lens module 100.

In FIG. 1D, the imaging lens module 100 may further include an opticalfolding element 101 disposed close to the object-side end 110 a of theplastic barrel 110. The object-side end 110 a is the end, which istoward the object side za, of the plastic barrel 110. It can be saidthat the optical folding element 101 is disposed on the object side zawith respect to the plastic barrel 110 and the optical lens assembly140. Therefore, it is favorable for providing the imaging lens module100 with the feasibility to be disposed in an electronic device in athin form. Furthermore, the optical folding element 101 may be a prism,a mirror, but not limited thereto. The optical folding element 101 isconfigured for folding the light into the imaging lens module 100.

The data of the aforementioned parameters of the imaging lens module 100according to the 1st embodiment of the present disclosure are listed inthe following Table 1, and the parameters are also shown in FIG. 1A,FIG. 1 B, FIG. 1F and FIG. 1I.

TABLE 1 1st Embodiment L1 (mm) 7.320 φ1 (mm) 3.110 L2 (mm) 1.838 φ2 (mm)2.700 L1/L2 3.98 φ2/φ1 0.87 N 120 Td (mm) 6.300 d (mm) 0.319 W (mm)0.809 D (mm) 1.900 W/Td 0.13 d/D 0.17

2nd Embodiment

FIG. 2A is a schematic view of an imaging lens module 200 according tothe 2nd embodiment of the present disclosure. FIG. 2B is an explodedview of the imaging lens module 200 according to FIG. 2A. In FIG. 2A andFIG. 2B, the imaging lens module 200 has an optical axis z, an objectside za and an image side zb. The imaging lens module 200 includes aplastic barrel 210, an optical lens assembly 240, an image-sideassembled element 260 and a light blocking element assembly 280.

FIG. 2C is a three-dimensional view of the plastic barrel 210 of the 2ndembodiment. In FIG. 2A to FIG. 2C, the plastic barrel 210 surrounds theoptical axis z to form an accommodating space 217 and includes a firstcontacting surface 215, which is close to an image-side end 210 b of theplastic barrel 210. The plastic barrel 210 is in a tube shape andextends from the object side za to the image side zb. The plastic barrel210 further includes an inner protruding portion 212, which extendstoward the optical axis z, and a minimum opening 219 of the plasticbarrel 210 is located at the inner protruding portion 212. The opticallens assembly 240 is disposed in the accommodating space 217 of theplastic barrel 210 and includes optical lens elements 241, 242, 243, 244and 245, in order from the object side za to the image side zb.

FIG. 2D is a three-dimensional view of the image-side assembled element260 of the 2nd embodiment. In FIG. 2A, FIG. 2B and FIG. 2D, theimage-side assembled element 260 is disposed close and connected to theimage-side end 210 b of the plastic barrel 210. The image-side assembledelement 260 is in a tube shape and extends from the object side za tothe image side zb, and the image-side assembled element 260 surroundsthe optical axis z and is disposed coaxially with the plastic barrel210. The image-side assembled element 260 includes a second contactingsurface 265 and an inner protruding portion 262. The second contactingsurface 265 is disposed close to an object-side end 260 a of theimage-side assembled element 260 and correspondingly to the firstcontacting surface 215. The inner protruding portion 262 extends towardthe optical axis z, and a minimum opening 279 of the image-sideassembled element 260 is located at the inner protruding portion 262.

The light blocking element assembly 280 is disposed in the image-sideassembled element 260 and includes light blocking elements 281, 271 and282, in order from the object side za to the image side zb. The lightblocking element 281 is abutted with an annular wall 263 b of the innerprotruding portion 262. In the 2nd embodiment, each of the lightblocking elements 281 and 282 is a light blocking sheet, the lightblocking element 271 is a spacer, and the light blocking element 271 isdisposed between the light blocking elements 281 and 282. The innerprotruding portion 262 of the image-side assembled element 260 includesannular walls 263 a and 263 b. A normal direction of the annular wall263 a and a normal direction of the annular wall 263 b are both parallelto the optical axis z.

In FIG. 2A, the plastic barrel 210 and the image-side assembled element260 both in the tube shapes contact each other via the first contactingsurface 215 and the second contacting surface 265 to be disposedcoaxially with respect to the optical axis z. Specifically, the firstcontacting surface 215 is located at an inner annular surface of theplastic barrel 210. The second contacting surface 265 is located at anouter annular surface of the image-side assembled element 260.

In detail, a glue groove 221 is formed between the plastic barrel 210and the image-side assembled element 260. A glue material 222 isdisposed in the glue groove 221. In the 2nd embodiment, the glue groove221 is formed between a recessed section of the inner annular surface ofthe plastic barrel 210 and the outer annular surface of the image-sideassembled element 260. The image-side assembled element 260 includes atleast two annular side openings 274, so that the glue groove 221 betweenthe plastic barrel 210 and the image-side assembled element 260 isconnected to the outside of the imaging lens module 200.

In FIG. 2A and FIG. 2D, the first contacting surface 215 and the secondcontacting surface 265 contact each other. The second contacting surface265 includes a plurality of stripe structures 266. Each of the stripestructures 266 is in a stripe shape and extends to the glue groove 221between the plastic barrel 210 and the image-side assembled element 260.The stripe structures 266 are regularly arranged along a circumferentialdirection of the optical axis z. In the 2nd embodiment, each of thefirst contacting surface 215, the second contacting surface 265 and theglue groove 221 is in an annular shape around the optical axis z.

In FIG. 2D, the minimum opening 279 is formed by a minimum inner annularsurface 276 of the image-side assembled element 260. The minimum opening279 is in a non-circular shape. The minimum inner annular surface 276includes four arc sections 277 and four line sections 278. The arcsections 277 have the same radius value and the same circle center. Thearc sections 277 and the line sections 278 are alternatively arrangedalong the circumferential direction of the optical axis z. Two ends ofeach of the line sections 278 are respectively connected to two of thearc sections 277, i.e., two ends of each of the arc sections 277 arerespectively connected to two of the line sections 278.

The image-side assembled element 260 is made of a black plastic materialby an injection molding method, and the outer annular surface of theimage-side assembled element 260 includes at least three gate traces269. Therefore, it is favorable for increasing the completeness of thesurface structure of the image-side assembled element 260, so as toraise the success rate and the production quality of the product made bythe injection molding method. In the 2nd embodiment, a number of thegate traces 269 is three, as shown in FIG. 2D.

FIG. 2E is a three-dimensional view of a light blocking sheet 250 of the2nd embodiment. In FIG. 2A, FIG. 2B and FIG. 2E, the imaging lens module200 further includes the light blocking sheet 250 disposed between theplastic barrel 210 and the annular wall 263 a of the inner protrudingportion 262 of the image-side assembled element 260. An object-sidesurface 250 a of the light blocking sheet 250 is abutted with theplastic barrel 210, and an image-side surface 250 b of the lightblocking sheet 250 is abutted with the annular wall 263 a.

Among the light blocking elements 281, 271 and 282 of the light blockingelement assembly 280, each of the light blocking elements 281 and 282 isa light blocking sheet. Among the light blocking sheet 250 and the lightblocking elements 281, 282, which are the light blocking sheets, atleast an inner opening 259 of the light blocking sheet 250 is in anon-circular shape. The inner opening 259 is formed by an inner annularsurface 256 of the light blocking sheet 250. The inner annular surface256 includes four arc sections 257 and four line sections 258. The arcsections 257 have the same radius value and the same circle center. Thearc sections 257 and the line sections 258 are alternatively arrangedalong the circumferential direction of the optical axis z. Two ends ofeach of the line sections 258 are respectively connected to two of thearc sections 257, i.e., two ends of each of the arc sections 257 arerespectively connected to two of the line sections 258.

Among the light blocking sheet 250 and the light blocking elements 281,282, which are the light blocking sheets, the inner opening 259 isformed by the inner annular surface 256 of the light blocking sheet 250.The inner annular surface 256 has a chamfering structure, and the innerannular surface 256 is tapered from the image side zb to the object sideza or from the object side za to the image side zb. Therefore, at leastone of the light blocking sheet 250 and the light blocking elements 281,282, which are the light blocking sheets, having the aforementionedfeatures is advantageous in reducing the occurrence probability of theextra stray light.

Specifically, the light blocking sheet 250 and the light blockingelements 281, 282, which are the light blocking sheets, all have thefeatures aforementioned in the last paragraph. The inner annular surface256 is tapered from the image side zb to the object side za, and theinner opening 259 is formed by the inner annular surface 256 being thechamfering structure. Each of the arc sections 257 being an inclined arcsurface of the inner annular surface 256 is tapered from the image sidezb to the object side za, and each of the line sections 258 being aninclined surface of the inner annular surface 256 is tapered from theimage side zb to the object side za. An inner opening 2819 is formed byan inner annular surface 2816 of the light blocking element 281. Theinner annular surface 2816 has a chamfering structure, and the innerannular surface 2816 is tapered from the image side zb to the objectside za. An inner opening 2829 is formed by an inner annular surface2826 of the light blocking element 282. The inner annular surface 2826has a chamfering structure, and the inner annular surface 2826 istapered from the image side zb to the object side za.

In FIG. 2A, FIG. 2C and FIG. 2E, the inner annular surface of theplastic barrel 210 further includes a directional protrusion 223, whichprotrudes toward the optical axis z and extends along the direction ofthe optical axis z. An outer annular surface of the light blocking sheet250 includes a directional notch 253 recessed toward the optical axis z.A position, which is located correspondingly to the inner protrudingportion 262, of the outer annular surface of the image-side assembledelement 260 includes a directional groove, which is recessed toward theoptical axis z and extends along the direction of the optical axis z.The directional protrusion 223 is disposed correspondingly to thedirectional notch 253 and the directional groove.

In FIG. 2A to FIG. 2C, the imaging lens module 200 further includes afirst retainer 230 disposed in the accommodating space 217 of theplastic barrel 210 and for fixedly disposing the optical lens assembly240. A glue groove 231 is formed between the plastic barrel 210 and thefirst retainer 230, and a glue material 232 is disposed in the gluegroove 231. Specifically, the first retainer 230 is disposed on theobject side za with respect to the optical lens assembly 240 and forfixedly disposing the optical lens assembly 240. The glue groove 231 isformed between a recessed section of the inner annular surface of theplastic barrel 210 and an outer surface of the first retainer 230.

A contact surface 213 of the plastic barrel 210 and a contact surface233 of the first retainer 230 contact each other. The contact surface233 of the first retainer 230 includes a plurality of stripe structures234. Each of the stripe structures 234 is in a stripe shape and extendsto the glue groove 231, which is formed between the plastic barrel 210and the first retainer 230. The stripe structures 234 are regularlyarranged along the circumferential direction of the optical axis z. Inthe 2nd embodiment, the contact surface 213 is located on the innerannular surface of the plastic barrel 210, and the contact surface 233is located on the outer annular surface of the first retainer 230. Eachof the contact surfaces 213, 233 and the glue groove 231 is in two arcshapes corresponding to the same positions on the circumferentialdirection of the optical axis z.

In FIG. 2A, FIG. 2B and FIG. 2D, the imaging lens module 200 furtherincludes a second retainer 290 disposed in the image-side assembledelement 260 and for fixedly disposing the light blocking elementassembly 280. A glue groove 291 is formed between the image-sideassembled element 260 and the second retainer 290, and a glue material292 is disposed in the glue groove 291. Specifically, the secondretainer 290 is disposed on the image side zb with respect to the lightblocking element assembly 280 and for fixedly disposing the lightblocking element assembly 280. The glue groove 291 is formed between arecessed section of the inner annular surface of the image-sideassembled element 260 and an outer annular surface of the secondretainer 290.

A contact surface 267 of the image-side assembled element 260 and acontact surface 297 of the second retainer 290 contact each other. Atleast one of the contact surface 267 of the image-side assembled element260 and the contact surface 297 of the second retainer 290(specifically, the contact surface 267 of the image-side assembledelement 260) includes a plurality of stripe structures 268. Each of thestripe structures 268 is in a stripe shape and extends to the gluegroove 291, which is formed between the image-side assembled element 260and the second retainer 290. The stripe structures 268 are regularlyarranged along the circumferential direction of the optical axis z.Therefore, it is favorable for increasing the assembling and contactingforce between the image-side assembled element 260 and the secondretainer 290, so as to raise the dispensing efficiency and convenientlymanufacture the stripe structures 268 by the injection molding method.Specifically, the contact surface 267 is located on the inner annularsurface of the image-side assembled element 260, and the contact surface297 is located on the outer annular surface of the second retainer 290.Each of the contact surfaces 267, 297 and the glue groove 291 is in twoarc shapes corresponding to the same positions on the circumferentialdirection of the optical axis z. In another embodiment (not shown indrawings) according to the present disclosure, a contact surface of theimage-side assembled element and a contact surface of the secondretainer contact each other and both include a plurality of stripestructures.

In FIG. 2B, among the optical lens elements 241, 242, 243, 244 and 245of the optical lens assembly 240, a distance along the direction of theoptical axis z between an object-side surface 241 a of the optical lenselement 241, which is closest to the object side za thereamong, and animage-side surface 245 b of the optical lens element 245, which isclosest to the image side zb thereamong, is Td. Among the light blockingelements 281, 271 and 282 of the light blocking element assembly 280, adistance along the direction of the optical axis z between anobject-side surface 281 a of the light blocking element 281, which isclosest to the object side za thereamong, and an image-side surface 282b of the light blocking element 282, which is closest to the image sidezb thereamong, is W.

The data of the parameters of the imaging lens module 200 according tothe 2nd embodiment of the present disclosure are listed in the followingTable 2, and the parameters are also shown as FIG. 2A and FIG. 2B. Thedefinitions of these parameters shown in Table 2 are the same as thosestated in the imaging lens module 100 according to the 1st embodiment.

TABLE 2 2nd Embodiment L1 (mm) 7.300 φ1 (mm) 3.110 L2 (mm) 1.938 φ2 (mm)2.700 L1/L2 3.77 φ2/φ1 0.87 N 90 Td (mm) 6.300 d (mm) 0.301 W (mm) 0.809D (mm) 1.914 W/Td 0.13 d/D 0.16

3rd Embodiment

FIG. 3A is a schematic view of an imaging lens module 300 according tothe 3rd embodiment of the present disclosure. FIG. 3B is an explodedview of the imaging lens module 300 according to FIG. 3A. In FIG. 3A andFIG. 3B, the imaging lens module 300 has an optical axis z, an objectside za and an image side zb. The imaging lens module 300 includes aplastic barrel 310, an optical lens assembly 340, an image-sideassembled element 360 and a light blocking element assembly 380.

The plastic barrel 310 surrounds the optical axis z to form anaccommodating space 317 and includes a first contacting surface 315,which is close to an image-side end 310 b of the plastic barrel 310. Theplastic barrel 310 is in a tube shape and extends from the object sideza to the image side zb. The plastic barrel 310 further includes aninner protruding portion 312, which extends toward the optical axis z,and a minimum opening 319 of the plastic barrel 310 is located at theinner protruding portion 312. The optical lens assembly 340 is disposedin the accommodating space 317 of the plastic barrel 310 and includesoptical lens elements 341, 342, 343, 344 and 345, in order from theobject side za to the image side zb.

The image-side assembled element 360 is disposed close and connected tothe image-side end 310 b of the plastic barrel 310. The image-sideassembled element 360 is in a tube shape and extends from the objectside za to the image side zb, and the image-side assembled element 360surrounds the optical axis z and is disposed coaxially with the plasticbarrel 310. The image-side assembled element 360 includes a secondcontacting surface 365 and an inner protruding portion 362. The secondcontacting surface 365 is disposed close to an object-side end 360 a ofthe image-side assembled element 360 and correspondingly to the firstcontacting surface 315. The inner protruding portion 362 extends towardthe optical axis z, and a minimum opening 379 of the image-sideassembled element 360 is located at the inner protruding portion 362.

The light blocking element assembly 380 is disposed in the image-sideassembled element 360 and includes light blocking elements 381, 371 and382, in order from the object side za to the image side zb. The lightblocking element 381 is abutted with an annular wall 363 b of the innerprotruding portion 362. In the 3rd embodiment, each of the lightblocking elements 381 and 382 is a light blocking sheet, the lightblocking element 371 is a spacer, and the light blocking element 371 isdisposed between the light blocking elements 381 and 382. The innerprotruding portion 362 of the image-side assembled element 360 includesannular walls 363 a and 363 b. A normal direction of the annular wall363 a and a normal direction of the annular wall 363 b are both parallelto the optical axis z.

In FIG. 3A, the plastic barrel 310 and the image-side assembled element360 both in the tube shapes contact each other via the first contactingsurface 315 and the second contacting surface 365 to be disposedcoaxially with respect to the optical axis z. Specifically, the firstcontacting surface 315 is located at an outer annular surface of theplastic barrel 310. The second contacting surface 365 is located at aninner annular surface of the image-side assembled element 360.

In detail, a glue groove 321 is formed between the plastic barrel 310and the image-side assembled element 360. A glue material 322 isdisposed in the glue groove 321. In the 3rd embodiment, the glue groove321 is formed between the outer annular surface of the plastic barrel310 and a recessed section of the inner annular surface of theimage-side assembled element 360.

The first contacting surface 315 and the second contacting surface 365contact each other. The second contacting surface 365 includes aplurality of stripe structures 366. Each of the stripe structures 366 isin a stripe shape and extends to the glue groove 321 between the plasticbarrel 310 and the image-side assembled element 360. The stripestructures 366 are regularly arranged along a circumferential directionof the optical axis z.

In FIG. 3B, the image-side assembled element 360 is made of a blackplastic material by an injection molding method, and an outer annularsurface of the image-side assembled element 360 includes two gate traces369. The minimum opening 379 is formed by a minimum inner annularsurface 376 of the image-side assembled element 360. The minimum opening379 may be in a non-circular shape.

FIG. 3C is a three-dimensional view of a plurality of wedge structures364 of the 3rd embodiment. In FIG. 3A to FIG. 3C, the inner annularsurface of the image-side assembled element 360 includes the wedgestructures 364, which are regularly arranged along the circumferentialdirection of the optical axis z. Each of the wedge structures 364 istapered toward the optical axis z, i.e., a V-shaped groove is formedbetween adjacent two of the wedge structures 364. Therefore, it isfavorable for the manufacturability of the injection molding method andeliminating the specific light beams. Specifically, the wedge structures364 are disposed on the inner protruding portion 362.

In FIG. 3A and FIG. 3B, the imaging lens module 300 further includes thelight blocking sheet 350 disposed between the plastic barrel 310 and theannular wall 363 a of the inner protruding portion 362 of the image-sideassembled element 360. An object-side surface 350 a of the lightblocking sheet 350 is abutted with the plastic barrel 310, and animage-side surface 350 b of the light blocking sheet 350 is abutted withthe annular wall 363 a.

Among the light blocking elements 381, 371 and 382 of the light blockingelement assembly 380, each of the light blocking elements 381 and 382 isa light blocking sheet. Among the light blocking sheet 350 and the lightblocking elements 381, 382, which are the light blocking sheets, aninner opening 359 is formed by an inner annular surface 356 of the lightblocking sheet 350. The inner annular surface 356 has a chamferingstructure, and the inner annular surface 356 is tapered from the objectside za to the image side zb. An inner opening 3819 is formed by aninner annular surface 3816 of the light blocking element 381. An inneropening 3829 is formed by an inner annular surface 3826 of the lightblocking element 382. The inner annular surface 3826 has a chamferingstructure, and the inner annular surface 3826 is tapered from the imageside zb to the object side za. In addition, at least one of the inneropenings 359, 3819 and 3829 may be in a non-circular shape.

The imaging lens module 300 further includes a first retainer 330disposed in the accommodating space 317 of the plastic barrel 310 andfor fixedly disposing the optical lens assembly 340. A glue groove 331is formed between the plastic barrel 310 and the first retainer 330, anda glue material 332 is disposed in the glue groove 331. Specifically,the first retainer 330 is disposed on the object side za with respect tothe optical lens assembly 340 and for fixedly disposing the optical lensassembly 340. The glue groove 331 is formed between a recessed sectionof the inner annular surface of the plastic barrel 310 and an outersurface of the first retainer 330.

A contact surface 313 of the plastic barrel 310 and a contact surface333 of the first retainer 330 contact each other. The contact surface313 of the plastic barrel 310 includes a plurality of stripe structures314. Each of the stripe structures 314 is in a stripe shape and extendsto the glue groove 331, which is formed between the plastic barrel 310and the first retainer 330. The stripe structures 314 are regularlyarranged along the circumferential direction of the optical axis z. Inthe 3rd embodiment, the contact surface 313 is located on the innerannular surface of the plastic barrel 310, and the contact surface 313is located on the outer annular surface of the first retainer 330.

The imaging lens module 300 further includes a second retainer 390disposed in the image-side assembled element 360 and for fixedlydisposing the light blocking element assembly 380. A glue groove 391 isformed between the image-side assembled element 360 and the secondretainer 390, and a glue material 392 is disposed in the glue groove391. Specifically, the second retainer 390 is disposed on the image sidezb with respect to the light blocking element assembly 380 and forfixedly disposing the light blocking element assembly 380. The gluegroove 391 is formed between a recessed section of the inner annularsurface of the image-side assembled element 360 and an outer annularsurface of the second retainer 390.

A contact surface 367 of the image-side assembled element 360 and acontact surface 397 of the second retainer 390 contact each other. Thecontact surface 367 of the image-side assembled element 360 includes aplurality of stripe structures 368. Each of the stripe structures 368 isin a stripe shape and extends to the glue groove 391, which is formedbetween the image-side assembled element 360 and the second retainer390. The stripe structures 368 are regularly arranged along thecircumferential direction of the optical axis z. Specifically, thecontact surface 367 is located on the inner annular surface of theimage-side assembled element 360, and the contact surface 397 is locatedon the outer annular surface of the second retainer 390.

In FIG. 3B, among the optical lens elements 341, 342, 343, 344 and 345of the optical lens assembly 340, a distance along the direction of theoptical axis z between an object-side surface 341 a of the optical lenselement 341, which is closest to the object side za thereamong, and animage-side surface 345 b of the optical lens element 345, which isclosest to the image side zb thereamong, is Td. Among the light blockingelements 381, 371 and 382 of the light blocking element assembly 380, adistance along the direction of the optical axis z between anobject-side surface 381 a of the light blocking element 381, which isclosest to the object side za thereamong, and an image-side surface 382b of the light blocking element 382, which is closest to the image sidezb thereamong, is W.

The data of the parameters of the imaging lens module 300 according tothe 3rd embodiment of the present disclosure are listed in the followingTable 3, and the parameters are also shown as FIG. 3A and FIG. 3B. Thedefinitions of these parameters shown in Table 3 are the same as thosestated in the imaging lens module 100 according to the 1st embodiment.

TABLE 3 3rd Embodiment L1 (mm) 6.853 φ1 (mm) 3.110 L2 (mm) 2.638 φ2 (mm)2.900 L1/L2 2.60 φ2/φ1 0.93 N 180 Td (mm) 6.300 d (mm) 0.360 W (mm)0.809 D (mm) 2.200 W/Td 0.13 d/D 0.16

4th Embodiment

FIG. 4A is a schematic view of an imaging lens module 400 according tothe 4th embodiment of the present disclosure. FIG. 4B is an explodedview of the imaging lens module 400 according to FIG. 4A. In FIG. 4A andFIG. 4B, the imaging lens module 400 has an optical axis z, an objectside za and an image side zb. The imaging lens module 400 includes aplastic barrel 410, an optical lens assembly 440, an image-sideassembled element 460 and a light blocking element assembly 480.

FIG. 4C is a three-dimensional view of the plastic barrel 410 of the 4thembodiment. In FIG. 4A to FIG. 4C, the plastic barrel 410 surrounds theoptical axis z to form an accommodating space 417 and includes a firstcontacting surface 415, which is close to an image-side end 410 b of theplastic barrel 410. The plastic barrel 410 is in a tube shape andextends from the object side za to the image side zb. The plastic barrel410 further includes an inner protruding portion 412, which extendstoward the optical axis z, and a minimum opening 419 of the plasticbarrel 410 is located at the inner protruding portion 412. The opticallens assembly 440 is disposed in the accommodating space 417 of theplastic barrel 410 and includes optical lens elements 441, 442, 443, 444and 445, in order from the object side za to the image side zb.

In FIG. 4A and FIG. 4B, the image-side assembled element 460 is disposedclose and connected to the image-side end 410 b of the plastic barrel410. The image-side assembled element 460 is in a tube shape and extendsfrom the object side za to the image side zb, and the image-sideassembled element 460 surrounds the optical axis z and is disposedcoaxially with the plastic barrel 410. The image-side assembled element460 includes a second contacting surface 465 and an inner protrudingportion 462. The second contacting surface 465 is disposed close to anobject-side end 460 a of the image-side assembled element 460 andcorrespondingly to the first contacting surface 415. The innerprotruding portion 462 extends toward the optical axis z, and a minimumopening 479 of the image-side assembled element 460 is located at theinner protruding portion 462.

The light blocking element assembly 480 is disposed in the image-sideassembled element 460 and includes light blocking elements 481, 471,482, 472 and 483, in order from the object side za to the image side zb.The light blocking element 483 is abutted with an annular wall 463 a ofthe inner protruding portion 462. In the 4th embodiment, each of thelight blocking elements 481, 482 and 483 is a light blocking sheet, eachof the light blocking elements 471 and 472 is a spacer, the lightblocking element 471 is disposed between the light blocking elements 481and 482, and the light blocking element 472 is disposed between thelight blocking elements 482 and 483. The inner protruding portion 462 ofthe image-side assembled element 460 includes annular walls 463 a and463 b. A normal direction of the annular wall 463 a and a normaldirection of the annular wall 463 b are both parallel to the opticalaxis z.

In FIG. 4A, the plastic barrel 410 and the image-side assembled element460 both in the tube shapes contact each other via the first contactingsurface 415 and the second contacting surface 465 to be disposedcoaxially with respect to the optical axis z. Specifically, the firstcontacting surface 415 is located at an outer annular surface of theplastic barrel 410. The second contacting surface 465 is located at aninner annular surface of the image-side assembled element 460.

In detail, a glue groove 421 is formed between the plastic barrel 410and the image-side assembled element 460. A glue material 422 isdisposed in the glue groove 421. In the 4th embodiment, the glue groove421 is formed between the outer annular surface of the plastic barrel410 and a recessed section of the inner annular surface of theimage-side assembled element 460.

In FIG. 4A to FIG. 4C, the first contacting surface 415 and the secondcontacting surface 465 contact each other. The first contacting surface415 includes a plurality of stripe structures 416. Each of the stripestructures 416 is in a stripe shape and extends to the glue groove 421between the plastic barrel 410 and the image-side assembled element 460.The stripe structures 416 are regularly arranged along a circumferentialdirection of the optical axis z. In the 4th embodiment, each of thefirst contacting surface 415, the second contacting surface 465 and theglue groove 421 is in four arc shapes corresponding to the samepositions on the circumferential direction of the optical axis z. A sumof the stripe structures 416 of the four arc shapes of the firstcontacting surface 415 is the parameter N according to the presentdisclosure.

In FIG. 4B, the image-side assembled element 460 is made of a blackplastic material by an injection molding method, and an outer annularsurface of the image-side assembled element 460 includes two gate traces469. The minimum opening 479 is formed by a minimum inner annularsurface 476 of the image-side assembled element 460. The minimum opening479 may be in a non-circular shape.

Among the light blocking elements 481, 471, 482, 472 and 483 of thelight blocking element assembly 480, each of the light blocking elements481, 482 and 483 is a light blocking sheet. An inner opening 4819 isformed by an inner annular surface 4816 of the light blocking element481. An inner opening 4829 is formed by an inner annular surface 4826 ofthe light blocking element 482. The inner annular surface 4826 has achamfering structure, and the inner annular surface 4826 is tapered fromthe image side zb to the object side za. An inner opening 4839 is formedby an inner annular surface 4836 of the light blocking element 483. Theinner annular surface 4836 has a chamfering structure, and the innerannular surface 4836 is tapered from the image side zb to the objectside za. In addition, at least one of the inner openings 4819, 4829 and4839 may be in a non-circular shape.

FIG. 4D is a three-dimensional view of a first retainer 430 of the 4thembodiment. In FIG. 4A, FIG. 4B and FIG. 4C, the imaging lens module 400further includes the first retainer 430 disposed in the accommodatingspace 417 of the plastic barrel 410 and for fixedly disposing theoptical lens assembly 440. A glue groove 431 is formed between theplastic barrel 410 and the first retainer 430, and a glue material 432is disposed in the glue groove 431. Specifically, the first retainer 430is disposed on the object side za with respect to the optical lensassembly 440 and for fixedly disposing the optical lens assembly 440.The glue groove 431 is formed between a recessed section of the innerannular surface of the plastic barrel 410 and an outer surface of thefirst retainer 430.

A contact surface 413 of the plastic barrel 410 and a contact surface433 of the first retainer 430 contact each other. The contact surface433 of the first retainer 430 includes a plurality of stripe structures434. Each of the stripe structures 434 is in a stripe shape and extendsto the glue groove 431, which is formed between the plastic barrel 410and the first retainer 430. The stripe structures 434 are regularlyarranged along the circumferential direction of the optical axis z. Inthe 4th embodiment, the contact surface 413 is located on the innerannular surface of the plastic barrel 410, and the contact surface 433is located on the outer annular surface of the first retainer 430. Eachof the contact surfaces 413, 433 and the glue groove 431 is in two arcshapes corresponding to the same positions on the circumferentialdirection of the optical axis z.

In FIG. 4A and FIG. 4B, the imaging lens module 400 further includes asecond retainer 490 disposed in the image-side assembled element 460 andfor fixedly disposing the light blocking element assembly 480. A gluegroove 491 is formed between the image-side assembled element 460 andthe second retainer 490, and a glue material 492 is disposed in the gluegroove 491. Specifically, the second retainer 490 is disposed on theobject side za with respect to the light blocking element assembly 480and for fixedly disposing the light blocking element assembly 480. Theglue groove 491 is formed between a recessed section of the innerannular surface of the image-side assembled element 460 and an outerannular surface of the second retainer 490.

A contact surface 467 of the image-side assembled element 460 and acontact surface 497 of the second retainer 490 contact each other. Thecontact surface 497 of the second retainer 490 includes a plurality ofstripe structures 498. Each of the stripe structures 498 is in a stripeshape and extends to the glue groove 491, which is formed between theimage-side assembled element 460 and the second retainer 490. The stripestructures 498 are regularly arranged along the circumferentialdirection of the optical axis z. Specifically, the contact surface 467is located on the inner annular surface of the image-side assembledelement 460, and the contact surface 497 is located on the outer annularsurface of the second retainer 490.

In FIG. 4B, among the optical lens elements 441, 442, 443, 444 and 445of the optical lens assembly 440, a distance along the direction of theoptical axis z between an object-side surface 441 a of the optical lenselement 441, which is closest to the object side za thereamong, and animage-side surface 445 b of the optical lens element 445, which isclosest to the image side zb thereamong, is Td. Among the light blockingelements 481, 471, 482, 472 and 483 of the light blocking elementassembly 480, a distance along the direction of the optical axis zbetween an object-side surface 481 a of the light blocking element 481,which is closest to the object side za thereamong, and an image-sidesurface 483 b of the light blocking element 483, which is closest to theimage side zb thereamong, is W.

The data of the parameters of the imaging lens module 400 according tothe 4th embodiment of the present disclosure are listed in the followingTable 4, and the parameters are also shown as FIG. 4A and FIG. 4B. Thedefinitions of these parameters shown in Table 4 are the same as thosestated in the imaging lens module 100 according to the 1st embodiment.

TABLE 4 4th Embodiment L1 (mm) 6.703 φ1 (mm) 3.110 L2 (mm) 2.838 φ2 (mm)3.200 L1/L2 2.36 φ2/φ1 1.03 N 60 Td (mm) 6.300 d (mm) 0.320 W (mm) 1.528D (mm) 2.300 W/Td 0.24 d/D 0.14

5th Embodiment

FIG. 5A shows a schematic view of an electronic device 10 according tothe 5th embodiment of the present disclosure, FIG. 5B shows anotherschematic view of the electronic device 10 according to the 5thembodiment, and particularly, FIG. 5A and FIG. 5B are schematic viewsrelated to a camera of the electronic device 10. In FIG. 5A and FIG. 5B,the electronic device 10 of the 5th embodiment is a smart phone. Theelectronic device 10 includes a camera unit 11, wherein the camera unit11 includes an imaging lens module 12 according to the presentdisclosure and an image sensor 13. The imaging lens module 12 may be oneof the aforementioned imaging lens modules 100, 200, 300 and 400, oranother imaging lens module according to the present disclosure. Theimage sensor 13 is disposed on an image surface (not shown in drawings)of the imaging lens module 12. Therefore, a better image quality can beachieved, and hence the high-end imaging requirements of modernelectronic devices can be satisfied.

Furthermore, the user activates the capturing mode via a user interface19 of the electronic device 10, wherein the user interface 19 of the 5thembodiment can be a touch screen 19 a, a button 19 b and etc. At thismoment, the imaging light of the imaging lens module 12 is converged onthe image sensor 13, and the electronic signal associated with image isoutput to an image signal processor (ISP) 18.

FIG. 5C shows a block diagram of the electronic device 10 according tothe 5th embodiment, and in particular, the block diagram is related tothe camera of the electronic device 10. In FIG. 5A to FIG. 5C, thecamera unit 11 can further include an autofocus assembly 14 and anoptical anti-shake mechanism 15 based on the camera specification of theelectronic device 10. Moreover, the electronic device 10 can furtherinclude at least one auxiliary optical component 17 and at least onesensing component 16. The auxiliary optical component 17 can be a flashmodule for compensating for the color temperature, an infrared distancemeasurement component, a laser focus module and etc. The sensingcomponent 16 can have functions for sensing physical momentum andkinetic energy, and thereby can be an accelerator, a gyroscope, and aHall effect element, to sense shaking or jitters applied by hands of theuser or external environments. Accordingly, the functions of theautofocus assembly 14 and the optical anti-shake mechanism 15 of thecamera unit 11 can be aided and enhanced to achieve the superior imagequality. Furthermore, the electronic device 10 according to the presentdisclosure can have a capturing function with multiple modes, such astaking optimized selfies, high dynamic range (HDR) under a low lightcondition, 4K resolution recording, etc. Additionally, the user canvisually see the captured image of the camera through the touch screen19 a and manually operate the view finding range on the touch screen 19a to achieve the auto focus function of what you see is what you get.

Furthermore, in FIG. 5B, the camera unit 11, the sensing component 16and the auxiliary optical component 17 can be disposed on a flexibleprinted circuit board (FPC) 77 and electrically connected with theassociated components, such as the imaging signal processor 18, via aconnector 78 to perform a capturing process. Since the currentelectronic devices, such as smart phones, have a tendency of beingcompact, the way of firstly disposing the camera unit and relatedcomponents on the flexible printed circuit board and secondlyintegrating the circuit thereof into the main board of the electronicdevice via the connector can satisfy the requirements of the mechanicaldesign and the circuit layout of the limited space inside the electronicdevice, and obtain more margins. The autofocus function of the cameraunit can also be controlled more flexibly via the touch screen of theelectronic device. In the 5th embodiment, the electronic device 10includes a plurality of sensing components 16 and a plurality ofauxiliary optical components 17. The sensing components 16 and theauxiliary optical components 17 are disposed on the flexible printedcircuit board 77 and at least one other flexible printed circuit board(its reference numeral is omitted) and electrically connected with theassociated components, such as the image signal processor 18, viacorresponding connectors to perform the capturing process. In otherembodiments (not shown herein), the sensing components and the auxiliaryoptical components can also be disposed on the main board of theelectronic device or carrier boards of other types according torequirements of the mechanical design and the circuit layout.

In addition, the electronic device 10 can further include but not belimited to a wireless communication unit, a control unit, a storageunit, a random access memory, a read-only memory, or a combinationthereof.

6th Embodiment

FIG. 6A shows a schematic view of an electronic device 20 according tothe 6th embodiment of the present disclosure, and FIG. 6B shows anotherschematic view of the electronic device 20 according to the 6thembodiment. In FIG. 6A and FIG. 6B, the electronic device 20 of the 6thembodiment is a smart phone. The electronic device 20 includes cameraunits 21 a, 21 b and 21 c, which are disposed on the same side of theelectronic device 20 and may have different optical properties. At leastone of the camera units 21 a, 21 b and 21 c includes an imaging lensmodule according to the present disclosure and an image sensor, and theimage sensor is disposed on an image surface of the imaging lens module.In another embodiment according to the present disclosure (not shown inthe drawings), the electronic device may be an electronic device with atleast two camera units, e.g., a smart phone with two camera units, asmart phone with three camera units, a smart phone with four cameraunits, or a tablet personal computer with two camera units.

In the photographing procedure of the electronic device 20, at least oneimage can be captured by the camera units 21 a, 21 b and 21 c with anaid of an auxiliary optical component 27, and then the required effectslike zooming, delicate images would be achieved by the processors (suchas an image signal processor 28 and so on) equipped in the electronicdevice 20. In addition, it should be realized that the configurations ofthe camera units of the electronic device according to the presentdisclosure are not limited to the positions disclosed in FIG. 6A andFIG. 6B.

7th Embodiment

FIG. 7 shows an electronic device 30 according to the 7th embodiment ofthe present disclosure. The electronic device 30 of the 7th embodimentis a wearable device. The electronic device 30 includes a camera unit31. The camera unit 31 includes an imaging lens module (not shown indrawings) according to the present disclosure and an image sensor (notshown in drawings), and the image sensor is disposed on an image surfaceof the imaging lens module.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTables show different data of the different embodiments; however, thedata of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. An imaging lens module, having an optical axis,an object side and an image side, and comprising: a plastic barrelsurrounding the optical axis to form an accommodating space, wherein theplastic barrel comprises a first contacting surface, which is close toan image-side end of the plastic barrel; an optical lens assemblydisposed in the accommodating space of the plastic barrel and comprisinga plurality of optical lens elements; an image-side assembled elementdisposed close to the image-side end of the plastic barrel, wherein theimage-side assembled element is in a tube shape and extends from theobject side to the image side, the image-side assembled elementsurrounds the optical axis and is disposed coaxially with the plasticbarrel, the image-side assembled element comprises a second contactingsurface and an inner protruding portion, the second contacting surfaceis disposed close to an object-side end of the image-side assembledelement and correspondingly to the first contacting surface, the innerprotruding portion extends toward the optical axis, and a minimumopening of the image-side assembled element is located at the innerprotruding portion; and a light blocking element assembly disposed inthe image-side assembled element and comprising a plurality of lightblocking elements, wherein one of the light blocking elements is abuttedwith an annular wall of the inner protruding portion; wherein theplastic barrel and the image-side assembled element contact each othervia the first contacting surface and the second contacting surface, alength along an optical axis direction of the plastic barrel is L1, alength along the optical axis direction of the image-side assembledelement is L2, and the following condition is satisfied:1.5<L1/L2<5.0.
 2. The imaging lens module of claim 1, wherein a gluegroove is formed between the plastic barrel and the image-side assembledelement, and a glue material is disposed in the glue groove.
 3. Theimaging lens module of claim 2, wherein at least one of the firstcontacting surface and the second contacting surface comprises aplurality of stripe structures, each of the stripe structures is in astripe shape and extends to the glue groove, and the stripe structuresare regularly arranged along a circumferential direction of the opticalaxis.
 4. The imaging lens module of claim 2, further comprising: a firstretainer disposed in the accommodating space of the plastic barrel andfor fixedly disposing the optical lens assembly, wherein another gluegroove is formed between the plastic barrel and the first retainer, andanother glue material is disposed in the another glue groove.
 5. Theimaging lens module of claim 4, wherein a contact surface of the plasticbarrel and a contact surface of the first retainer contact each other,at least one contact surface of the contact surface of the plasticbarrel and the contact surface of the first retainer comprises aplurality of stripe structures, each of the stripe structures is in astripe shape and extends to the another glue groove, and the stripestructures are regularly arranged along a circumferential direction ofthe optical axis.
 6. The imaging lens module of claim 2, furthercomprising: a second retainer disposed in the image-side assembledelement and for fixedly disposing the light blocking element assembly,wherein another glue groove is formed between the image-side assembledelement and the second retainer, and another glue material is disposedin the another glue groove.
 7. The imaging lens module of claim 6,wherein a contact surface of the image-side assembled element and acontact surface of the second retainer contact each other, at least onecontact surface of the contact surface of the image-side assembledelement and the contact surface of the second retainer comprises aplurality of stripe structures, each of the stripe structures is in astripe shape and extends to the another glue groove, and the stripestructures are regularly arranged along a circumferential direction ofthe optical axis.
 8. The imaging lens module of claim 1, wherein theminimum opening is formed by a minimum inner annular surface of theimage-side assembled element, the minimum inner annular surfacecomprises a plurality of arc sections and a plurality of line sections,the arc sections have the same radius value and the same circle center,the arc sections and the line sections are alternatively arranged alonga circumferential direction of the optical axis, and each of the linesections is connected two of the arc sections.
 9. The imaging lensmodule of claim 1, further comprising: a light blocking sheet disposedbetween the plastic barrel and another annular wall of the innerprotruding portion, wherein an object-side surface of the light blockingsheet is abutted with the plastic barrel, and an image-side surface ofthe light blocking sheet is abutted with the another annular wall. 10.The imaging lens module of claim 9, wherein one of the light blockingelements of the light blocking element assembly is another lightblocking sheet, an inner opening is formed by an inner annular surfaceof one of the light blocking sheet and the another light blocking sheet,the inner annular surface comprises a plurality of arc sections and aplurality of line sections, the arc sections have the same radius valueand the same circle center, the arc sections and the line sections arealternatively arranged along a circumferential direction of the opticalaxis, and each of the line sections is connected two of the arcsections.
 11. The imaging lens module of claim 9, wherein the plasticbarrel further comprises a directional protrusion, which protrudestoward the optical axis and extends along the optical axis direction;wherein the light blocking sheet comprises a directional notch recessedtoward the optical axis; wherein the image-side assembled elementcomprises a directional groove, which is recessed toward the opticalaxis and extends along the optical axis direction; wherein thedirectional protrusion is disposed correspondingly to the directionalnotch and the directional groove.
 12. The imaging lens module of claim9, wherein one of the light blocking elements of the light blockingelement assembly is another light blocking sheet, an inner opening isformed by an inner annular surface of one of the light blocking sheetand the another light blocking sheet, the inner annular surface has achamfering structure, and the inner annular surface is tapered from theimage side to the object side or from the object side to the image side.13. The imaging lens module of claim 1, wherein the image-side assembledelement is made of a black plastic material by an injection moldingmethod, and the image-side assembled element further comprises at leasttwo gate traces.
 14. The imaging lens module of claim 13, wherein theimage-side assembled element further comprises a plurality of wedgestructures, which are regularly arranged along a circumferentialdirection of the optical axis, and each of the wedge structures istapered toward the optical axis.
 15. The imaging lens module of claim14, wherein a number of the gate traces is at least three.
 16. Theimaging lens module of claim 1, wherein among the optical lens elementsof the optical lens assembly, a distance along the optical axisdirection between an object-side surface of one of the optical lenselements closest to the object side and an image-side surface of one ofthe optical lens elements closest to the image side is Td; wherein amongthe light blocking elements of the light blocking element assembly, adistance along the optical axis direction between an object-side surfaceof one of the light blocking elements closest to the object side and animage-side surface of one of the light blocking elements closest to theimage side is W; wherein the following condition is satisfied:0.10<W/Td<0.35.
 17. The imaging lens module of claim 1, wherein adiameter of a minimum opening of the plastic barrel is φ1, a diameter ofthe minimum opening of the image-side assembled element is φ2, and thefollowing condition is satisfied:0.7<φ2/φ1<1.2.
 18. The imaging lens module of claim 3, wherein a numberof the stripe structures of the at least one of the first contactingsurface and the second contacting surface is N, and the followingcondition is satisfied:60≤N≤360.
 19. The imaging lens module of claim 1, wherein a length alongthe optical axis direction of each of the first contacting surface andthe second contacting surface is d, a smallest distance from the firstcontacting surface and the second contacting surface to the optical axisis D, and the following condition is satisfied:0.03<d/D<0.35.
 20. The imaging lens module of claim 1, furthercomprising: an optical folding element disposed close to an object-sideend of the plastic barrel.
 21. An electronic device, comprising: theimaging lens module of claim 1; and an image sensor disposed on an imagesurface of the imaging lens module.